Issue Description

Please describe your issue, along with:

in this example https://github.com/eclipse/deeplearning4j-examples/blob/master/samediff-examples/src/main/java/org/nd4j/examples/samediff/quickstart/basics/Ex2_LinearRegression.java why gradMap.get("weights") and gradMap.get("bias") return me different value when I run it in many times ?

• expected gradMap.get("weights") and gradMap.get("bias") return the same values when run it in many times
• encountered gradMap.get("weights") and gradMap.get("bias") return me different values when run it in many times

Version Information

Please indicate relevant versions, including, if relevant:

• Deeplearning4j version: beta7
• platform information (OS, etc): mac OS10.15.6
• CUDA version, if used: None
• NVIDIA driver version, if in use: None